package life.majiang.community.dto;

import lombok.Data;

import java.util.ArrayList;
import java.util.List;

@Data
public class PaginationDTO <T>{
    private List<T> data;
    private boolean showPrevious;
    private boolean showFirstPage;
    private boolean showNext;
    private boolean showEndPage;
    private Integer page;
    private List<Integer> pages = new ArrayList<>();
    private Integer totalPage;
    public void setPagination(Integer totalPage, Integer page) {
        this.totalPage =totalPage;
        this.page = page;
        pages.add(page);
        for(int i=1;i<=3;i++){
            if(page-i>0){
                pages.add(0,page-i);
            }
            if(page+i<=totalPage){
                pages.add(page+i);
            }
        }
        //是否展示上一页
        if(page == 1){
            showPrevious = false;
        }else {
            showPrevious = true;
        }
        //是否展示下一页
        if (page == totalPage){
            showNext = false;
        }else {
            showNext = true;
        }
        //是否展示第一页
        if(pages.contains(1)){
            showFirstPage = false;
        }else {
            showFirstPage = true;
        }

        //是否展示最后一页
        if(pages.contains(totalPage)){
            showEndPage =false;
        }else {
            showEndPage = true;
        }
    }


}


